One-star reviews, in addition to being the least helpful kind of review, are also the longest and the worst-spelled. Data journalism blog Priceonomics analyzed 100,000 online product reviews and found that 40% of one-star reviews have at least one spelling mistake, vs. under 30% of five-star reviews.

Five-star reviews, though, are most likely to leave out periods at the ends of sentences—likely because they’re shorter—and four-star reviews are the most likely to leave out apostrophes. Weirdly, after adjusting for length, three-star reviews have the most frequent errors.